Rotary hedge cutter



R. JEANNETT l 2,1 15,265

ROTARY HEDGE CUTTER Aprilzs, 193s.'

Filed Jan. 24, 1936 'a'llllllll..

,Zig 2.7 Y

BY A

` ATToRN Patented Apr. 26, 193s 'UNITED STATES PATENT OFFICE no'rAnY HEDGE ov'r'rnn Robert Jemen, Camden, N. J. Application January 24, 193s, sei-ns1 No. 60,555

" 7 claims. '(01. :4c-276).

The object of the invention is to provide improvements in rotary hedge cutters, and more particularly in that type which is driven or actuated by an electric motor, or other means, for

producing rotation of the one or more knives with respect toa relatively' stationary support, this application comprising a continuation in part of co-pending application Serial No. 743,325 led September 10, 1934, which matured into Patent 10 No. 2,028,784, issued January 28, 1936. y

Another object is to provide in such a-'device the combination of a rotatable shaft, ahead carried by saidshaft, s plu'rality of knives pivotally carried by said head. and rotatable in a common plane, said knives being angularly4 adjustable with respect to radii passing thru their-respective pivots', means to adjust said knives simultaneously, and means to secure said knives in predetermined angular arrangement. i

A further object is to'provide in such a devic Still another object isfto provide the combinal tion ofthe structure of the last paragraph, with means to simultaneously adjust the angular relationship of said knives .with respect to said cutting edge, and means to normallymaintain said knives in predetermined xed positions. V

And a still further object is to provide, in `com- .sus` bination withy the various structures hereinbefore recited, a casing having a substantially'cylindrlcal flange, which terminates in relatively close proximity to the plane of rotation of said head,A

and serves to prevent blades of grass, twigs of 40' hedge, and such foreign matter, from entering said casing and fouling the driving shaft.

With these `and other objects in mind, the invention comprises further details of construction and operation, which are hereinafter fully brought out In the `following description. when read in conjunction with 'the accompanying drawing, inwhich j Fig. l' is, a partially fragmentary front elevational view of a device comprising one embodi- 4 60 ment of the invention;

l'lg.- 2 is a-side elevational view of the driving motor with a fragmentary portion of the sup porting handle .of the same, and a sectional view of the cutting elements taken on the line `2--2 Fig. 3 is an enlarged fragmentary 'sectional view showing a portion of the knife supporting member, a' portion of the combined cutting element and adjusting and clamping means, and a knifey operatively positioned therebetween; and 5.

Fig. 4 is a front elevation of the supporting headand the knives in adjusted acute angular relation therewith. l v

Referring to the drawing, there is shown an electric motor I, which is representative of any .10

the same being supported by means of a handle 2, or otherwise, as may be desired. The usual shaft 3, of the motor is provided with a preferably demountable head or arbor I, to which is pref- 15 erably flxedly secured a disc-like supporting l member 5, providedwith a series of circumferentially spaced'arcuatel slots t, of substantially the same distance from the axis of said head. and also with spaced lugs `I adjacent to thefperiphery of said supporting member 5, for a purpose hereinafter-described. Y g

A disc-like cutting element 8, of a diameter preferably somewhat greater than the supporting member 5, is provided withcircumferentially spaced apertures 9, in which .are positioned bolts I0, the opposite free end portions of which extencllslidably thru the respective slots 8 and are provided with nuts or equivalent clamping means .II.' The cutting element l is co-axial with the so being' provided withA a longitudinally extending s lot I3, and with an aperture Il which normally 35 receives one of the lugs I, the slot Il receiving the adjacent -holt I0, as shown particularly in j Fig. 3. Each such knife is provided with'a `cut- -ting edge Il, which is preferably positioned substantially mid-way' between the planes of the 40 laterally' Opposite surfaces of such knife, while -the peripheral cutting edge I6 of the element 8 y is preferably in the plane of that surface of said element; which is adjacent to and binds vtightly againstthe knives I2. v

If the knife-supporting member 5 does not comprise anintegral part of the head 4, the latter is preferably'provided with a polygonal extension I `I.| which extends thru a similarly shaped aperture I 8 in the member 5, and is there' 50 after peened over, in order to prevent the accidental disengagement or -relative looseningof said member with respect to said head. It will also' be 

